copy/paste from mw.org
It is hard to see where the paragraph comes from when they are move.
Steps to reproduce
Proposed solution:
Add a hidden html element with a class (e.g. source -moved-paragraph1) in the origin paragraph, and a css class in the destination paragraph (e.g. dest-moved-paragraph1).
Highlight both paragraphs when a user hovers over the source or target paragraph.
This also allows users to use gadgets and css to better annotate such move for their own purposes. For instance if a paragraph is moved from a very far. It could then be possible to make it jump to the source, rather than scroll down manually.
It might also be beneficial to look into the work https://phabricator.wikimedia.org/T140340 and https://phabricator.wikimedia.org/T139603 to make sure the changes are somewhat consistent between different diff software.